I'd love to learn more about what you mean by this. In reality they shouldn't change, your customers would just be internal that's all. You could still measure activation, activation, retention, engagement, resolution time, etc. On the other hand, you could measure self help vs. those who still asked for support or metrics lik elatency.
The worst KPIs to commit to are the ones you can’t commit to at all. We can set targets and metrics and make dashboards, but that’s exactly what they are - targets. I recommend looking at past performance and trends within the data and setting a realistic yet aspirational target to work towards. After that, begin iterating on your target. Revisit the KPI, analyze, adjust, and communicate your findings.